As someone with naturally curly hair, I'm usually very careful about the hair products I use. Curly hair can be picky, and the wrong shampoo or conditioner can leave it dry, frizzy, or difficult to manage. Because of that, I was hesitant to try shampoo and conditioner bars at first. But after traveling with them for several trips, they've become one of my favorite travel essentials. The Problem with Traditional Bottles If you've ever traveled with only a carry-on, you know ho